摘要
以不同龄级(1~5年生)南川木波罗幼苗为研究对象,研究其生物量及分配,并利用苗高(H)、基径(D)及HD2估测单株木及其器官生物量的适合模型。结果表明:(1)随着苗龄的增加,单株生物量及各器官生物量随之增加,其中枝生物量增加幅度最大;(2)地上部分各器官生物量分配率表现为:干生物量>叶生物量>枝生物量;(3)地下部分各龄级根系生物量分配以主根和粗根为主,表现为:主根>粗根>细根,地上部分生物量分配率高于地下部分,并最后趋于稳定;(4)以基径(D)作为自变量优于利用株高(H)和HD2建立生物量预测模型,并且多以幂函数为最佳,建立的生物量预测模型中,除细根生物量预测模型较差外,其它预测模型效果都较好,相关系数均达到极显著水平,表明利用本文建立的估测南川木波罗各器官生物量模型是可行的。
The biomass and its allocation of Artocarpus nanchuanensis seedlings in different age classes were measured and analyzed, and the biomass allometric equations were established. The results showed as follows. With the increase of seedling ages, the biomass and its components of the undergrowth single Artocarpus nanchuanensis increased. The difference of branch biomass was the biggest, and the disparity achieved 478. 9 times. The aboveground biomass generally allocated in the order of stem biomass^leaf biomass^branch biomass. The stump and coarse roots in different ages seedling dominated the underground biomass, and the average biomass distribution rate of various sizes of roots had the sequence of stump root biomass^coarse root biomass^minor root biomass. As a main part of biomass, the proportion of aboveground biomass in total biomass decreased with the increase of seedling age and finally tended to stabilize. The single biomass and the biomass in different organs were more relevant to basal diameter （D） than the height （H） and HD2 ,and a power function model was the better one. The allometric equation of minor root biomass was the worst one, the rest were better, and the correlation coefficient ranged from 0. 873 to 0. 989. It indicates that the biomass allometric equations has been established is feasible.
出处
《长江流域资源与环境》
CAS
CSSCI
CSCD
北大核心
2013年第10期1313-1318,共6页
Resources and Environment in the Yangtze Basin
基金
国家林业局2011年珍稀濒危物种调查监管项目(40500611)
关键词
南川木波罗
预测模型
生物量
分配率
Artocarpus nanchuanensis
biomass distribution rate
allometric equation
